Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
On-Vehicle Inspection
- Perform the MAF meter inspection according to the procedures below.
- Only replace the MAF meter when the MAF value in the DATA LIST (with the engine stopped) is not within the normal operating range or there is foreign matter on the MAF meter platinum hot wire (heater).
- INSPECT MASS AIR FLOW METER
- Read the value using the Techstream.NOTE:
- Perform the inspection with the vehicle indoors and on a level surface.
- Perform the inspection of the MAF meter while it is installed to the air cleaner case (installed to the vehicle).
- During the test, do not use the exhaust air duct to perform suction on the exhaust pipe.
- Warm up the engine.
- Turn the ignition switch OFF.
- Connect Techstream to the DLC3.
- Turn the ignition switch ON.
- Turn the tester ON.
- Enter the following menus:
Select: Powertrain / Engine and ECT / Data List / MAF.
- Wait 30 seconds, and read the values on the Techstream.
Specified condition
ITEM SPECIFIED CONDITION CHARTItem Condition Specified Condition MAF - Engine not running
- 30 seconds after ignition switch is turned ON
Below 0.29 g/sec. If the result is not as specified, replace the MAF meter.
If the result is within the specified range, inspect the MAF meter.
- Remove the MAF meter.
- Perform a visual check for any foreign matter on the platinum hot wire (heater) of the mass air flow meter shown in the illustration.
OK:
There is no foreign material.
If the result is not as specified, replace the mass air flow meter.
- Install the MAF meter.
- Read the value using the Techstream.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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